论文标题
具有全局复杂横向场的非热XY自旋链中的量子相变
Quantum phase transition in a non-Hermitian XY spin chain with global complex transverse field
论文作者
论文摘要
在这项工作中，我们研究了非热XY自旋链中的量子相变。该相图表明，在引入非富特效应后，ISing相变的临界点扩展到关键过渡区。通过分析非热差距和远程相关函数，可以通过不同的差距特征和相关函数的衰减属性来区分不同的阶段，这是传统XY模型中一个棘手的问题。此外，结果揭示了相图的不同区域之间的关系，非热能能量差距和远程相关函数。
In this work, we investigate the quantum phase transition in a non-Hermitian XY spin chain. The phase diagram shows that the critical points of Ising phase transition expand into a critical transition zone after introducing a non-Hermitian effect. By analyzing the non-Hermitian gap and long-range correlation function, one can distinguish different phases by means of different gap features and decay properties of correlation function, a tricky problem in traditional XY model. Furthermore, the results reveal the relationship among different regions of the phase diagram, non-Hermitian energy gap and long-range correlation function.
